Multilevel modeling of retention and disinfection efficacy of silver nanoparticles on ceramic water filters

This research examined how variations in synthesis methods of silver nanoparticles affect both the release of silver from ceramic water filters (CWFs) and disinfection efficacy. The silver nanoparticles used were stabilized by four different molecules: citrate, polyvinylpyrrolidone, branched polyeth...

Full description

Saved in:
Bibliographic Details
Published in:The Science of the total environment Vol. 566-567; pp. 368 - 377
Main Authors: Mikelonis, Anne M., Lawler, Desmond F., Passalacqua, Paola
Format: Journal Article
Language:English
Published: Netherlands Elsevier B.V 01.10.2016
Subjects:
casein
Caseins - chemistry
Ceramic water filters
ceramics
Ceramics - chemistry
citrates
Citric Acid - chemistry
coliform bacteria
Disinfectants - chemistry
Disinfection
Disinfection - methods
Environmental engineering
Excipients - chemistry
filtrates
Filtration
Filtration - methods
Ghana
Metal Nanoparticles - chemistry
Models, Theoretical
Multilevel model
nanosilver
Polyethyleneimine - chemistry
polyvinylpyrrolidone
Povidone - chemistry
rain
silver
Silver - chemistry
Silver nanoparticles
statistical models
surface water
water filters
Water Purification - methods
Ghana
NaBH4
Filtration
PPCC
Ag
Disinfection
PVP
Ceramic water filters
BPEI
AgNO3
Multilevel model
Environmental engineering
CWF
DALYs
LRV(s)
TEM
PHW
Silver nanoparticles
WHO
ISSN:0048-9697, 1879-1026, 1879-1026
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This research examined how variations in synthesis methods of silver nanoparticles affect both the release of silver from ceramic water filters (CWFs) and disinfection efficacy. The silver nanoparticles used were stabilized by four different molecules: citrate, polyvinylpyrrolidone, branched polyethylenimine, and casein. A multilevel statistical model was built to quantify if there was a significant difference in: a) extent of silver lost, b) initial amount of silver lost, c) silver lost for water of different quality, and d) total coliform removal. Experiments were performed on location at Pure Home Water, a CWF factory in Tamale, Ghana using stored rainwater and dugout water (a local surface water). The results indicated that using dugout vs. rainwater significantly affects the initial (p-value 0.0015) and sustained (p-value 0.0124) loss of silver, but that silver type does not have a significant effect. On average, dugout water removed 37.5μg/L more initial silver and had 1.1μg/L more silver in the filtrate than rainwater. Initially, filters achieved 1.9 log reduction values (LRVs) on average, but among different silver and water types this varied by as much as 2.5 LRV units. Overall, bacterial removal effectiveness was more challenging to evaluate, but some data suggest that the branched polyethylenimine silver nanoparticles provided improved initial bacterial removal over filters which were not painted with silver nanoparticles (p-value 0.038). [Display omitted] •Multilevel modeling is useful for analysis of environmental data.•Ag NP stabilizer does not significantly affect total Ag release from CWFs.•Water type significantly affects the release of total Ag from CWFs.•BPEI silver nanoparticles may provide improved coliform removal.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2016.05.076